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Fe-Cr-C-TiC High-Chromium Fe-Based Ceramic Composite Coating Prepared by PTA Weld-Surfacing Process

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Abstract:

In situ synthesized Fe-Cr-C-TiC high-chromium Fe-based ceramic composite coating was fabricated on substrate of Q235 steel by plasma transferred arc (PTA) weld-surfacing process using the mixture of ferrotitanium, ferrochromium, ferroboron and ferrosilicium powders. The microstructure and wear properties of the composite coating were investigated by XRD, SEM, EDS, microhardness tester and wear tester. Results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite. The coating is metallurgically bonded to the Q235 steel substrate. TiC particles formed by PTA weld-surfacing process present cubic, dendrite and flower-like shape. The wear resistance of the composite coating is approximately 11 times higher than that of the base body Q235. As the load increases, the wear mass loses slowly, which demonstrates the composite coating has excellent load character.

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Periodical:

Materials Science Forum (Volumes 675-677)

Pages:

783-787

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.675-677.783

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Online since:

February 2011

Authors:

Li Mei Wang, Jun Bo Liu, Chi Yuan

Keywords:

Ceramic Coating, Microstructure, PTA Weld-Surfacing, TiC Particle, Wear Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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